diff --git a/dsp/adsprpc.c b/dsp/adsprpc.c
index 43648e97bd..9903d4f48a 100644
--- a/dsp/adsprpc.c
+++ b/dsp/adsprpc.c
@@ -5478,6 +5478,7 @@ int fastrpc_internal_mem_map(struct fastrpc_file *fl,
 	int err = 0;
 	struct fastrpc_mmap *map = NULL;
 
+	mutex_lock(&fl->internal_map_mutex);
 	VERIFY(err, fl->dsp_proc_init == 1);
 	if (err) {
 		pr_err("adsprpc: ERROR: %s: user application %s trying to map without initialization\n",
@@ -5516,6 +5517,7 @@ bail:
 			mutex_unlock(&fl->map_mutex);
 		}
 	}
+	mutex_unlock(&fl->internal_map_mutex);
 	return err;
 }
 
@@ -5526,6 +5528,7 @@ int fastrpc_internal_mem_unmap(struct fastrpc_file *fl,
 	struct fastrpc_mmap *map = NULL;
 	size_t map_size = 0;
 
+	mutex_lock(&fl->internal_map_mutex);
 	VERIFY(err, fl->dsp_proc_init == 1);
 	if (err) {
 		pr_err("adsprpc: ERROR: %s: user application %s trying to map without initialization\n",
@@ -5572,6 +5575,7 @@ bail:
 			mutex_unlock(&fl->map_mutex);
 		}
 	}
+	mutex_unlock(&fl->internal_map_mutex);
 	return err;
 }